Carbon, with an atomic number of 6, is fundamental to life, as all organic compounds are carbon-based. Extending this to “666” as a representation of carbon could symbolize material existence or physicality, as carbon is the building block of the physical body and much of the material world.

In some philosophical or spiritual frameworks, “666” is associated with materialism or being overly attached to worldly concerns, so linking it to carbon could serve as a metaphor for focusing solely on the physical or tangible aspects of existence rather than the spiritual or transcendent.